<HTML>
<BODY BGCOLOR="white">
<PRE>
<FONT color="green">001</FONT>    package org.hackystat.sensorshell;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.io.File;<a name="line.3"></a>
<FONT color="green">004</FONT>    import java.io.FileInputStream;<a name="line.4"></a>
<FONT color="green">005</FONT>    import java.io.FileOutputStream;<a name="line.5"></a>
<FONT color="green">006</FONT>    import java.text.SimpleDateFormat;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.util.Date;<a name="line.7"></a>
<FONT color="green">008</FONT>    import java.util.Locale;<a name="line.8"></a>
<FONT color="green">009</FONT>    import javax.xml.bind.JAXBContext;<a name="line.9"></a>
<FONT color="green">010</FONT>    import javax.xml.bind.Marshaller;<a name="line.10"></a>
<FONT color="green">011</FONT>    import javax.xml.bind.Unmarshaller;<a name="line.11"></a>
<FONT color="green">012</FONT>    import org.hackystat.sensorbase.resource.sensordata.jaxb.SensorData;<a name="line.12"></a>
<FONT color="green">013</FONT>    import org.hackystat.sensorbase.resource.sensordata.jaxb.SensorDatas;<a name="line.13"></a>
<FONT color="green">014</FONT>    import org.hackystat.utilities.home.HackystatUserHome;<a name="line.14"></a>
<FONT color="green">015</FONT>    import org.hackystat.utilities.stacktrace.StackTrace;<a name="line.15"></a>
<FONT color="green">016</FONT>    <a name="line.16"></a>
<FONT color="green">017</FONT>    /**<a name="line.17"></a>
<FONT color="green">018</FONT>     * Provides a facility for: (a) persisting buffered SensorData instances locally when the SensorBase<a name="line.18"></a>
<FONT color="green">019</FONT>     * host is not available and (b) recovering them during a subsequent invocation of SensorShell.<a name="line.19"></a>
<FONT color="green">020</FONT>     * <a name="line.20"></a>
<FONT color="green">021</FONT>     * @author Philip Johnson<a name="line.21"></a>
<FONT color="green">022</FONT>     */<a name="line.22"></a>
<FONT color="green">023</FONT>    public class OfflineManager {<a name="line.23"></a>
<FONT color="green">024</FONT>      <a name="line.24"></a>
<FONT color="green">025</FONT>      /** The directory where offline data is stored. */<a name="line.25"></a>
<FONT color="green">026</FONT>      private File offlineDir;<a name="line.26"></a>
<FONT color="green">027</FONT>      <a name="line.27"></a>
<FONT color="green">028</FONT>      /** The jaxb context. */<a name="line.28"></a>
<FONT color="green">029</FONT>      private JAXBContext jaxbContext;<a name="line.29"></a>
<FONT color="green">030</FONT>      <a name="line.30"></a>
<FONT color="green">031</FONT>      /** Holds the sensorShellProperties instance from the parent sensor shell. */<a name="line.31"></a>
<FONT color="green">032</FONT>      private SensorShellProperties properties; <a name="line.32"></a>
<FONT color="green">033</FONT>      <a name="line.33"></a>
<FONT color="green">034</FONT>      /** The shell that created this offline manager. **/<a name="line.34"></a>
<FONT color="green">035</FONT>      private SingleSensorShell parentShell; <a name="line.35"></a>
<FONT color="green">036</FONT>      <a name="line.36"></a>
<FONT color="green">037</FONT>      /** The tool that was created the parent shell. */<a name="line.37"></a>
<FONT color="green">038</FONT>      private String tool; <a name="line.38"></a>
<FONT color="green">039</FONT>      <a name="line.39"></a>
<FONT color="green">040</FONT>      /** Whether or not data has been stored offline. */<a name="line.40"></a>
<FONT color="green">041</FONT>      boolean hasOfflineData = false;<a name="line.41"></a>
<FONT color="green">042</FONT>      <a name="line.42"></a>
<FONT color="green">043</FONT>      /**<a name="line.43"></a>
<FONT color="green">044</FONT>       * Creates an OfflineManager given the parent shell and the tool. <a name="line.44"></a>
<FONT color="green">045</FONT>       * @param shell The parent shell.<a name="line.45"></a>
<FONT color="green">046</FONT>       * @param tool The tool. <a name="line.46"></a>
<FONT color="green">047</FONT>       */<a name="line.47"></a>
<FONT color="green">048</FONT>      public OfflineManager(SingleSensorShell shell, String tool) {<a name="line.48"></a>
<FONT color="green">049</FONT>        this.parentShell = shell;<a name="line.49"></a>
<FONT color="green">050</FONT>        this.properties = shell.getProperties();<a name="line.50"></a>
<FONT color="green">051</FONT>        this.tool = tool;<a name="line.51"></a>
<FONT color="green">052</FONT>        this.offlineDir = new File(HackystatUserHome.getHome(),  "/.hackystat/sensorshell/offline/");<a name="line.52"></a>
<FONT color="green">053</FONT>        this.offlineDir.mkdirs();<a name="line.53"></a>
<FONT color="green">054</FONT>        try {<a name="line.54"></a>
<FONT color="green">055</FONT>          this.jaxbContext = <a name="line.55"></a>
<FONT color="green">056</FONT>            JAXBContext.newInstance(<a name="line.56"></a>
<FONT color="green">057</FONT>                org.hackystat.sensorbase.resource.sensordata.jaxb.ObjectFactory.class);<a name="line.57"></a>
<FONT color="green">058</FONT>        }<a name="line.58"></a>
<FONT color="green">059</FONT>        catch (Exception e) {<a name="line.59"></a>
<FONT color="green">060</FONT>          throw new RuntimeException("Could not create JAXB context.", e);<a name="line.60"></a>
<FONT color="green">061</FONT>        }<a name="line.61"></a>
<FONT color="green">062</FONT>      }<a name="line.62"></a>
<FONT color="green">063</FONT>      <a name="line.63"></a>
<FONT color="green">064</FONT>      /**<a name="line.64"></a>
<FONT color="green">065</FONT>       * Stores a SensorDatas instance to a serialized file in the offline directory.<a name="line.65"></a>
<FONT color="green">066</FONT>       * Does nothing if there are no sensordata instances in the SensorDatas instance.<a name="line.66"></a>
<FONT color="green">067</FONT>       * @param sensorDatas The SensorDatas instance to be stored. <a name="line.67"></a>
<FONT color="green">068</FONT>       */<a name="line.68"></a>
<FONT color="green">069</FONT>      public void store(SensorDatas sensorDatas) {<a name="line.69"></a>
<FONT color="green">070</FONT>        if (sensorDatas.getSensorData().size() &gt; 0) {<a name="line.70"></a>
<FONT color="green">071</FONT>          SimpleDateFormat fileTimestampFormat = <a name="line.71"></a>
<FONT color="green">072</FONT>            new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss.SSS", Locale.US);<a name="line.72"></a>
<FONT color="green">073</FONT>          String fileStampString = fileTimestampFormat.format(new Date());<a name="line.73"></a>
<FONT color="green">074</FONT>          File outFile = new File(this.offlineDir, fileStampString + ".xml");<a name="line.74"></a>
<FONT color="green">075</FONT>          try {<a name="line.75"></a>
<FONT color="green">076</FONT>            Marshaller marshaller = jaxbContext.createMarshaller();<a name="line.76"></a>
<FONT color="green">077</FONT>            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);<a name="line.77"></a>
<FONT color="green">078</FONT>            marshaller.marshal(sensorDatas, new FileOutputStream(outFile));<a name="line.78"></a>
<FONT color="green">079</FONT>            parentShell.println("Stored " + sensorDatas.getSensorData().size() + <a name="line.79"></a>
<FONT color="green">080</FONT>                " sensor data instances in: "  + outFile.getAbsolutePath());<a name="line.80"></a>
<FONT color="green">081</FONT>            this.hasOfflineData = true;<a name="line.81"></a>
<FONT color="green">082</FONT>          }<a name="line.82"></a>
<FONT color="green">083</FONT>          catch (Exception e) {<a name="line.83"></a>
<FONT color="green">084</FONT>            parentShell.println("Error writing the offline file " + outFile.getName() + " " + e);<a name="line.84"></a>
<FONT color="green">085</FONT>          }<a name="line.85"></a>
<FONT color="green">086</FONT>        }<a name="line.86"></a>
<FONT color="green">087</FONT>      }<a name="line.87"></a>
<FONT color="green">088</FONT>      <a name="line.88"></a>
<FONT color="green">089</FONT>      /**<a name="line.89"></a>
<FONT color="green">090</FONT>       * Returns true if this offline manager has successfully stored any data offline.  <a name="line.90"></a>
<FONT color="green">091</FONT>       * @return True if offline data has been stored. <a name="line.91"></a>
<FONT color="green">092</FONT>       */<a name="line.92"></a>
<FONT color="green">093</FONT>      public boolean hasOfflineData() {<a name="line.93"></a>
<FONT color="green">094</FONT>        return this.hasOfflineData;<a name="line.94"></a>
<FONT color="green">095</FONT>      }<a name="line.95"></a>
<FONT color="green">096</FONT>      <a name="line.96"></a>
<FONT color="green">097</FONT>      <a name="line.97"></a>
<FONT color="green">098</FONT>      /**<a name="line.98"></a>
<FONT color="green">099</FONT>       * Attempts to resend any previously stored SensorDatas instances from their serialized files.<a name="line.99"></a>
<FONT color="green">100</FONT>       * Creates a new sensorshell instance to do the sending. <a name="line.100"></a>
<FONT color="green">101</FONT>       * Each SensorDatas instance is deserialized, then each SensorData instance inside is<a name="line.101"></a>
<FONT color="green">102</FONT>       * sent to the SensorShell.  This gives the SensorShell an opportunity to <a name="line.102"></a>
<FONT color="green">103</FONT>       * send batches off at whatever interval it chooses.<a name="line.103"></a>
<FONT color="green">104</FONT>       * All serialized files are deleted after being processed if successful.<a name="line.104"></a>
<FONT color="green">105</FONT>       * @throws SensorShellException If problems occur sending the recovered data.<a name="line.105"></a>
<FONT color="green">106</FONT>       */<a name="line.106"></a>
<FONT color="green">107</FONT>      public void recover() throws SensorShellException {<a name="line.107"></a>
<FONT color="green">108</FONT>        // Return immediately if there are no offline files to process.<a name="line.108"></a>
<FONT color="green">109</FONT>        File[] xmlFiles = this.offlineDir.listFiles(new ExtensionFileFilter(".xml"));<a name="line.109"></a>
<FONT color="green">110</FONT>        if (xmlFiles.length == 0) {<a name="line.110"></a>
<FONT color="green">111</FONT>          return;<a name="line.111"></a>
<FONT color="green">112</FONT>        }<a name="line.112"></a>
<FONT color="green">113</FONT>        // Tell the parent shell log that we're going to try to do offline recovery.<a name="line.113"></a>
<FONT color="green">114</FONT>        parentShell.println("Invoking offline recovery on " + xmlFiles.length + " files.");<a name="line.114"></a>
<FONT color="green">115</FONT>    <a name="line.115"></a>
<FONT color="green">116</FONT>        // Create a new properties instance with offline recovery/storage disabled. <a name="line.116"></a>
<FONT color="green">117</FONT>        SensorShellProperties props = SensorShellProperties.getOfflineMode(this.properties);<a name="line.117"></a>
<FONT color="green">118</FONT>        // Provide a separate log file for this offline recovery. <a name="line.118"></a>
<FONT color="green">119</FONT>        String offlineTool = this.tool + "-offline-recovery";<a name="line.119"></a>
<FONT color="green">120</FONT>        // Create the offline sensor shell to be used for sending this data. <a name="line.120"></a>
<FONT color="green">121</FONT>        SingleSensorShell shell = new SingleSensorShell(props, false, offlineTool);<a name="line.121"></a>
<FONT color="green">122</FONT>        shell.println("Invoking offline recovery on " + xmlFiles.length + " files.");<a name="line.122"></a>
<FONT color="green">123</FONT>        FileInputStream fileStream = null;<a name="line.123"></a>
<FONT color="green">124</FONT>    <a name="line.124"></a>
<FONT color="green">125</FONT>        // For each offline file to recover<a name="line.125"></a>
<FONT color="green">126</FONT>        for (int i = 0; i &lt; xmlFiles.length; i++) {<a name="line.126"></a>
<FONT color="green">127</FONT>          try {<a name="line.127"></a>
<FONT color="green">128</FONT>            // Reconstruct the SensorDatas instances from the serialized files. <a name="line.128"></a>
<FONT color="green">129</FONT>            shell.println("Recovering offline data from: " + xmlFiles[i].getName());<a name="line.129"></a>
<FONT color="green">130</FONT>            fileStream = new FileInputStream(xmlFiles[i]);<a name="line.130"></a>
<FONT color="green">131</FONT>            Unmarshaller unmarshaller = this.jaxbContext.createUnmarshaller();<a name="line.131"></a>
<FONT color="green">132</FONT>            SensorDatas sensorDatas = (SensorDatas)unmarshaller.unmarshal(fileStream);<a name="line.132"></a>
<FONT color="green">133</FONT>            shell.println("Found " + sensorDatas.getSensorData().size() + " instances.");<a name="line.133"></a>
<FONT color="green">134</FONT>            for (SensorData data : sensorDatas.getSensorData()) {<a name="line.134"></a>
<FONT color="green">135</FONT>              shell.add(data);<a name="line.135"></a>
<FONT color="green">136</FONT>            }<a name="line.136"></a>
<FONT color="green">137</FONT>            // Try to send the data.<a name="line.137"></a>
<FONT color="green">138</FONT>            shell.println("About to send data");<a name="line.138"></a>
<FONT color="green">139</FONT>            int numSent = shell.send();<a name="line.139"></a>
<FONT color="green">140</FONT>            shell.println("Successfully sent: " + numSent + " instances.");<a name="line.140"></a>
<FONT color="green">141</FONT>            // If all the data was successfully sent, then we delete the file. <a name="line.141"></a>
<FONT color="green">142</FONT>            if (numSent == sensorDatas.getSensorData().size()) {<a name="line.142"></a>
<FONT color="green">143</FONT>              boolean isDeleted = xmlFiles[i].delete();<a name="line.143"></a>
<FONT color="green">144</FONT>              shell.println("Trying to delete " + xmlFiles[i].getName() + ". Success: " + isDeleted);<a name="line.144"></a>
<FONT color="green">145</FONT>            }<a name="line.145"></a>
<FONT color="green">146</FONT>            else {<a name="line.146"></a>
<FONT color="green">147</FONT>              shell.println("Did not send all instances. " + xmlFiles[i] + " not deleted.");<a name="line.147"></a>
<FONT color="green">148</FONT>            }<a name="line.148"></a>
<FONT color="green">149</FONT>            fileStream.close();<a name="line.149"></a>
<FONT color="green">150</FONT>          }<a name="line.150"></a>
<FONT color="green">151</FONT>          catch (Exception e) {<a name="line.151"></a>
<FONT color="green">152</FONT>            shell.println("Error recovering data from: " + xmlFiles[i] + " " + StackTrace.toString(e));<a name="line.152"></a>
<FONT color="green">153</FONT>            try {<a name="line.153"></a>
<FONT color="green">154</FONT>              fileStream.close();<a name="line.154"></a>
<FONT color="green">155</FONT>            }<a name="line.155"></a>
<FONT color="green">156</FONT>            catch (Exception f) { <a name="line.156"></a>
<FONT color="green">157</FONT>              shell.println("Failed to close: " + fileStream.toString() + " " + e);<a name="line.157"></a>
<FONT color="green">158</FONT>            }<a name="line.158"></a>
<FONT color="green">159</FONT>          }<a name="line.159"></a>
<FONT color="green">160</FONT>        }<a name="line.160"></a>
<FONT color="green">161</FONT>        shell.quit();<a name="line.161"></a>
<FONT color="green">162</FONT>      }<a name="line.162"></a>
<FONT color="green">163</FONT>    }<a name="line.163"></a>




























































</PRE>
</BODY>
</HTML>
